Games like Lone Soul
Games like Lone Soul include Hades, Hades II, Cinderia, Wolcen: Lords of Mayhem, and Grim Dawn. We matched them by the tags players give Lone Soul on Steam (Action, Hack and Slash, Dungeon Crawler, Action Roguelike, and Roguelike): closest matches first, and among equally close ones the better-known games.

Hades
Shared: Hack and Slash · Action Roguelike · Action

Hades II
Shared: Action · Hack and Slash · Roguelike

Cinderia
Shared: Hack and Slash · Action Roguelike · Action

Wolcen: Lords of Mayhem
Shared: Hack and Slash · Action · Action RPG

Grim Dawn
Shared: Hack and Slash · Action RPG · Isometric

Last Epoch
Shared: Hack and Slash · Action RPG · Action

Black Myth: Wukong
Shared: Action · Action RPG · Combat

Moonlighter
Shared: Hack and Slash · Dungeon Crawler · Roguelike

Diablo® IV
Shared: Hack and Slash · Action RPG · Isometric

Path of Exile 2
Shared: Hack and Slash · Action RPG · Action

Heroes of Hammerwatch II
Shared: Action Roguelike · Action · Dungeon Crawler

Dead Cells
Shared: Roguelike · Action Roguelike · Hack and Slash

Halls of Torment
Shared: Action Roguelike · Action · Roguelite

Shape of Dreams
Shared: Action Roguelike · Hack and Slash · Action

Wizard of Legend
Shared: Action Roguelike · Dungeon Crawler · Roguelike

Path of Exile
Shared: Hack and Slash · Action RPG · Dungeon Crawler

Children of Morta
Shared: Hack and Slash · Roguelike · Action Roguelike

Jotunnslayer: Hordes of Hel
Shared: Action Roguelike · Hack and Slash · Roguelike

Death Must Die
Shared: Action Roguelike · Hack and Slash · Action

The Binding of Isaac: Rebirth
Shared: Action Roguelike · Roguelike · Dungeon Crawler

Garden of Witches
Shared: Action · Action Roguelike · Hack and Slash

Soulstone Survivors
Shared: Action Roguelike · Roguelike · Roguelite

Curse of the Dead Gods
Shared: Action Roguelike · Action · Isometric

Skul: The Hero Slayer
Shared: Action · Action Roguelike · Roguelike